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All veretebrates are chordates but all chordates are not vertebrates, why?
Option: 1
Ventral hollow nerve cord remains throughout life in some chordates
Option: 2
All chordates posses vetebral column
Option: 3
All chordates posses notochord throughout their life.
Option: 4
Notochord is replaced by vertebral column in adult of some chordates
Answers (1)
- Animals can be non chordates or chordates depending on absence and presence of notochord
- Chordates can be invertebrates or vertebrates
- In some animals notochord is replaced by vertebral column and these are known as Vertebrates while in some animals notochord remains as it is as in invertebrates
- Thus all Chordates are not verterates but all Vertebrrates are Chordates
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